ericson



(No Modell.) 3 Sheets-Sheet 1.

L. E. ERIGSON. SOLE ROUNDING MACHINE.

No. 527,676'. Patented oet. 16, 1894.

(No Model.) s sheets-sheen L. E. B16166016. SOLE ROUNDING MACHINE.

616,527,676. Pai-,66666 061;. 16,1694.

3 Sheets-Sheet 3.

(No Model.) y v L. B. ERICSON.

SOLE ROUNDING MACHINE.

Patented om.. 16,1894.

' resents a section on line 4 4 of Fig. 1.

UNITED STATESA PATENT OFFICE.

LEWIS E. ERICSON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE-FLAGGMANUFACTURING COMPANY, OF SAME PLACE.

SOLE-ROUNDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 527,676, dated October16, 1894.

Application fled August 1, 1894.

Serial No. 519 ,141 (No model.)

To @ZZ whom it may concern:

Be it known that 1, LEWIS E. ERIosoN, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Sole-Rounding Machines, of which the following is aspecification.

This invention relates to machines for trimming pieces of leather intosole form by the action of a knife which is caused to travel around apattern against which the blank to be trimmed is clamped.

`The invention has for its object to provide various improvementswhereby the operation of a machine of this kind may be made moreefficient and desirable, and it consists in the improvements which Iwill now proceed to describe and claim.

Of the accompanying drawings, forming a part of thisspecification,-Figure1 represents a side elevation of a sole-roundingmachine embodying my improvements. Fig. 2 represents a section on line 22 of Fig. l. Fig. 3 represents an end elevation of the machine. Fig. 3arepresents a top view of a part of the machine. Fig. 3b represents asection on line .3b-3b of Fig. 3a. Fig. 4 rep- Fig. 5 represents asection on line 5 5 of Fig. 1, looking toward the right. Fig. 6represents a section on line 6 6 of Fig. 1,1ooking toward the right./Fig 7 represents a section on line 7 7 of Fig. 4, and a plan view ofthe parts below said line. Fig. 7l represents a section on line 7"' 7aof Fig. 7. Fig. 8 represents a top plan view of the machine.

- Fig. 9 represents a partial top plan View and partial section of theknife-carriage. Fig. 10 represents a section on line 10-10 of Fig. 9.Fig. 10a represents a section on line 10a-10a of Fig. 10. Fig. 11represents a section on line l1 11 of Fig. 9. Fig. 12 represents asectionpon line 12-12 of Fig. 1. Fig. 13 represents a section on line 1313 of Fig. 12.

The same letters of reference indicate the same parts in all thefigures.

In the drawings, a. represents the supporting standard, on which is thehead or frame supporting the chief working parts of the 5o machine.

b represents the pattern against which the cam-plate d, in which isformed a cam-groove d the shape of which approximates. that of thepattern; that is to say, the groove has the form of an ellipse the sideportions of which 4are flattened ormade parallel, as shown in Figs. 7and 8, the length and Width of the ellipse being somewhat greaterrespectively than the length and width of the pattern,.so that theknife-carriage hereinafter described, which is caused to travel aboutthe pattern and is guided by said groove, is moved in a path thatapproximates the form of the edge of the pattern, said carriage having aslide that directly supports the trimming knife and is pressed inwardlyagainst the edge of the pattern by spring pressure, so that the path ofthe knife conforms exactly to the shape of the edge of the pattern.

The cam-plate has a fixed stud b', and two "adjustable studs b2 b2 whichsupport the pattern b, the studs b2 b2 being at opposite sides ofthefixed stud b and affixed to slides b3 (Fig. 7a) which are fitted t0 movein alongitudinal guide-Way b4 in the cam-plate d, each stud b2 beingscrew-threaded and provided with a clamping nut b5 which may be turneddown against the top surface of the cam-plate. The studs b2 b2 cantherefore be adj usted to support patterns ofl any desired length, whilethe stud b', which is not adjustable serves as a guide to enable theoperatorI to properly locate the pattern, thelatter being provided withthree holes, one for each stud. The pattern rests loosely on the upperends of the nuts b5, and may be readily raised from the upper ends ofthe studs. The cam-plate is supported by a stud d5 (Fig. 4),whichis-rigidly attached to an arm d forming a part of the supporting frame.The cam-plate is detachably secured to the stud b3` by means of aclamping bolt e having an elongated head e (Fig. 7) formed to passthrough a slot d4 in the cam-plate d, and provided at its lower end witha camlever e2 which when turned to one position presses against a platee3 bearing on the under side of the arm a and 'draws th'e head edownwardly onto a seat formed for it around the slot d4, the bolt-headYe being turned at right angles with the slot d4. The cam-plate may bereleased by moving the cam-lever to release the pressure of the bolt andthen giving the bolt a quarter-turn, bringing its head into line withthe slot d4, whereupon the cam-plate may be raised from the stud d3.Dowel-pins ff(Fig. 4) secure exactness of position of the cam-plate whenit is in place.

g represents the knife-carriage, which rests loosely on the iiat uppersurface of a rotating driver h, which is a fiat plate rigidly affixed toa bevel-gearj hereinafter described, said gear being journaled in asuitable fixed bearing in the standard a. The gear j is positivelyrotated by the driving-shaft, and rotates the driver 7L. Motion isimparted from the driver to the knife-carriage by a coupling 71,connected at one end by a stud or pivot h2 with the driver, and at theother end by a stud or pivot h3 with the carriage. (See Fig. 3a.) Thecarriage g has two trundle-rolls g g2 which enter the cam-groove d', oneof said rolls being on the stud h3. The driver h is provided with arecess h6 (Figs. 3n` and 3b) which receives the coupling h', so that thelatter does not project above the carriage-supporting surface of thedriver, the swinging end of the coupling being adapted to slide on thebottom of the recess, while the upper side of the coupling is flush withthe upper surface of the driver, so that the coupling supports that partof the carriage which projects over the recess.

It will be seen that when the driver is rotated, the coupling h acts notonly to support a part of the knife-carriage, but also to communicatemotion from the driver to the knife-carriage and draw the latter alongin a path that is governed by the cam-groove. The variation in thedistance between dierent parts of the cam-groove and the center ofrotation of the driver causes the carriage to slide in and out on thehat surface of the driver, the coupling moving in and out with thecarriage, as indicated by full and dotted lines in Fig. 3a. It will alsobe seen that the coupling swinging freely in the recess h6 and arrangedto constantly exert a pulling force on the knife-carriage transmitspower from the driver to the carriage with little or no loss byfriction. The connection of the coupling to the stud that carries one ofthe camengaging rolls of the carriage still further reduces the loss ofpower by friction, since said connection causes all the power that movesthe carriage to be exerted practically in line with the saidcam-engaging rolls. Hence there is no tendency to press one roll againstone edge of the cam-groove and the other roll against the other edge, aswould be the case if the power were applied at a point considerably outof line with the cam-engaging rolls.

The trimming-knife g6 is directly supported by a slide g7, which issupported by the carriageg and is movable independently thereof towardand from the center of rotation of the driver h. Inward pressure isconstantly exerted on the slide g7 to hold the knife against the edge ofthe pattern, by a suitable spring or springs. In Figs. 9,10, and l1, Ishow the preferred arrangement of springs, and means for multiplying themotion caused by the action of the springs. i i represent the springs,which bear against supports afxed to the outer end of the carriage g andexert pressure in the direction indicated by the arrow (Fig. 9) on earst" formed on an independently movable frame i2. In said frame is journaled a shaft 3 to which are axed a larger pinion i4 and a smallerpinion i5. The pinion i4 meshes with a rack i7 affixed to the slide gi,while the pinion i5 meshes with a rack i affixed to the carriage g.

It will be seen that inward movement imparted by the springs to theframe i2 is multiplied by the pinions and racks, so that a short springhaving a comparatively limited range of movement may be employed.

To enable the slide g7 to be locked in a retracted position, as when thework is being applied and removed, I provide it with a series ofratchet-teeth Q9 (Fig. l0) arranged to be engaged by a spring-pawl g10aiiixed to the carriage g, said pawl engaging said teeth au# tomaticallyand locking the slide in any p0- sition to which it may be moved by alever Q12 which is pivoted at Q13 to the carriage, and is connected by alink Q14 with the slide. A movement of the lever gnin the directionindicated by the arrow in Fig. 8 moves the knife and slide .back fromthe pattern, the pawl glo holding the knife and slide at any point towhich they may be thus moved. The pawl may be depressed to release theslide, by means of a cam-shaped stud 915 journaled in one side of thecarriage and formed so that when turned to one position it will permitthe pawl to rise and engage a tooth g, and and when turned to anotherposition it will depress the pawl below said teeth.

To the driver h is affixed a bevel-gear j meshing with a bevel-gear k(see dotted lines in Fig. l) on a shaft m, the latter being rotated by aconnection with a shaft n, as hereinafter described, and imparting arotary movement to the driver h and causing the latter, through thecoupling h', to impel or draw the knife carriage around the cam-plateand pattern.

The shaft n is arranged out of alignment with the `shaft m, and isdriven by power communicated from a driving-shaft o through gears n oaffixed respectively to the shafts n and o. ,The shafts 'n and m are soconnected that a variable speed is imparted to the shaft m (the speed ofthe shaft n being constant) in order that the knife may move more slowlywhen trimming the toe and heel portions than when trimming the sideportions. To this end, I provide the gear n with parallel wings orguides n2 n2 between IXO IZO

which projects a trundle-roll m on a disk lm2 affixed to the shaft m.The relative arrangement of the shafts fm n causes the distance betweenthe said trundle-roll and the center of the shaft nto vary, as shown inFigs. 5 and 6, and therefore causes a corresponding variation in thespeed of rotation of the shaft m and of the parts driven thereby, therebeing two periods in each complete rotation when the motion isconsiderably retarded. The mechanism is so timed that the said periodsoccur when the knife is trimming the toe and heel portions of the blank.

The shaft `o is driven by a loose drivingpulley p thereon, said pulleyhaving a clutchmember, and a clutch-member p keyed to the shaft so as torotate therewith and slide thereon toward and from the pulley p.

I provide automatic means for stopping the operation of the machineafter each complete rotation of the driver h, said means being asfollows: Q represents a bell-crank lever pivoted at Q to the supportingframe. One arm of said lever has a fork Q2.engaging a grooved collaraffixed to the clutch-member p. The other arm of said lever has aninwardly projecting iinger Q3, which normally extends under a pin Q4adapted to slide in Iixed guides Q5 on the supporting frame, said pinbeing raised by a springv Q6. The upper end of the pin Q4 projects intothe path of a projection Q7 affixed to the under side of the driver h,said projection being formed to depress the pin Q4 when it is broughtover said pin. The depression of the pin Q4 is imparted, through thenger Q3, to the horizontal arm of the lever Q, and said lever is causedto move the clutch-member p away from the corresponding member on thedriving-pulley p and into contact with a fixed brake fr attached to thesupporting frame. The motion of the clutch-member p', shaft o, and themechanism driven by the latter, is therefore stopped by the describeddepression of the pin Q4.

In case it is desired to continue the operation of the machine withoutautomatically stopping it, the inger Q3 may be moved out of line withthe pin Q4, this movement being permitted by the pivotal connection ofthe finger Q3 with the lever Q shown at Q9 (Fig. 2). The finger Q3 isnormally heldin position under the pin Q2, by means of a spring Q10interposed between a handle Q12 on the linger Q3 and a handle Q13affixed to the lever Q.

The projection Q7 is adj ustably secured to the driver h, so that it.may be adjusted at any desired point, and therefore will stop theoperation when the knife has reached any desired part of the edge of thesole or pattern. To permit the convenient adjustment of the projectionQ7, I provide the under side of the driver h with a circular groove s(Fig. 4), with which the projection is adjustably engaged.

The clamp c is secured to a sliding rod or plunger c', which is movablein a socket c2 formed on the supporting frame. A lever c3 pivoted at c4to said frame bears at one end on the plunger c', and is connected atits other end by means of a rod c5 with a treadle-lever c6 at the baseof the machine. The operator, by depressing said lever, forces the clampdown upon a blank interposed between it and the pattern b. A spring c7[(Fig. l) in the socket c2 raises the clamp from the blank when thetreadle is released. The clamp is secured to the plunger c by means of ayoke c8 affixed to the clamp, and held by a detent 010 against a roundedbearing o9 in the lower i portion of the plunger c', said bearingperlmitting the yoke to oscillate to a limited extent, thus enabling theclamp to be slightly inclined endwise to compensate for variations inthe thickness of the blank.

The detent c10 is formed on an elastic metal t shank c12 aliixed at itsupper end to the plunger, and made sufficiently liexible between itsfixed end and the detent to permit any rocking motion of the clamp thatmay be required.

I do not limit myself to the particular devices and details ofconstruction hereinbefore described, and may vary the same within thelimits of mechanical skill, without departing from the spirit of myinvention. Y

I claiml. In a sole-rounding machine, the combination of the supportingframe, a fixed tubular stud or support such as d3 rigidly secured to thesupporting frame, the cam-plate supported by Aand detachable from thetubular stud and provided with a central slot, said plate and studhaving interlocking projections and recesses whereby exactness of posi-'tion of the plate is insured, and a clamping f bolt fitted to turn inthe orifice of the tubular stud and provided at its upper end with ahead adapted to be turned across the slot in the cam-plate and at itslower end with a clamping lever, as set forth.

2. A sole-rounding machine comprising in its construction a fixedpattern, a stud such as d3 aliixed to the supporting frame, a camplateattached to the upper end of said stud, a rotary driver mounted torotate on said stud and provided on its under side with a bevel-gear, aknifecarriageengaged with said driver and with thc cam-plate and havingaA knife co-operating with the pattern, a

shaft fm. having at one end a bevel-gear meshing with the bevel-gear onthe driver and at the other end an eccentrically arranged roll orprojection such as m', a shaft n out of line with the shaft m andprovided with parallel guides between which the roll m projects, andmeans for rotating the shaft n, as set forth.

3. A sole-rounding machine comprising in its construction a iixedpattern, a lixed camplate, a rotary driver having a projection such asQ7 on its under side, a knife-carriage independently movable on saiddriver and impelled thereby, a driving-shaft and conl ing aclutch-member, and secondly, a sliding clutch-member rotatively engagedwith the driving-shaft, a bell-crank lever pivoted to the supportingframe and engaged at one end with the sliding clutch-member, said leverbeing adapted to be moved by the operator to connect and disconnect theloose pulley and sliding clutch-member, and devices intermediate thesaid lever and the projection qT through which the lever may be moved bysaid projection to disconnect the loose pulley and clutch-member onceduring each rotation of the driver.

4. A sole-rounding machine comprising in its construction a fixedpattern, a fixed carnplate, a rotary driver, having a projection -suchas Q7 on its under side, a knife-carriage independently movable on saiddriver and :impelled thereby, a driving-shaft, and connections betweensaid shaft and the driver whereby the latter may be rotated, saidconnections including, first, a loose pulley having a clutch-member, andsecondly, a sliding clutch-member rota-tively engaged with thedriving-shaft, a bell-crank lever pivoted to the supporting frame andengaged at one end with the sliding clutch-member, said lever beingadapted to be moved by the operator to connect and disconnect the loosepulley and sliding-clutch-member, a plunger or pin such as g4 adapted tobe depressed bythe projection Q7, and a finger g3 pivotally connected tothe bell-crank lever and normally in position to be depressed by saidplunger, said finger being movable so that it may be displaced toprevent the stoppage of the driver.

5. In a sole-rounding machine, the combination of the carriage, theknife-supporting slide movable on said carriage, springs supported bythe carriage, and means for imparting a multiplied motion from thesprings to the slideas set forth.

6. In a sole-rounding machine, the combination of the carriage, theknife-supporting slide movable on said carriage, springs supported bythe carriage, a frame movable independently on the carriage by saidsprings and provided with a larger and a smaller pinion, a rack affixedto the carriage and meshing with the smaller pinion, and a rack affixedto the slide and meshing with the larger pinion, as set forth.

7. In a sole-rounding machine, the combination of the carriage, theknife-supporting slide movable on said carriage, a spring or springsarranged to force the slide forward, a lever and link whereby the slidemay be moved backward, ratchet-teeth and a. pawl whereby the slide maybe held in any position to which it may be retracted, and apawldisplacing device whereby the slide may be released.

8. In a sole-rounding machine, the combination with the pattern, of theclamp, the yoke rigidly fixed to the clamp, the plunger having a bearing on which the yoke is adapted to rock, and a detent connected byafexible spring with the plunger and adapted to detachably secure theyoke to the plunger, as set forth.

9. The cam havingla fixed pattern-guiding or locating stud and twoadjustable patternsupporting studs at opposite sides of the saidlocating stud, as set forth.

l0. The cam having a fixed pattern-guiding or locating stud and twoadjustable patternsupporting studs at opposite sides of the saidlocating stud, combined with a pattern having orifices for said studs.

11. The combination of the fixed cam-plate, the rotary driver having aflat upper surface and a recess in said surface, the knife-carriagehaving rolls entering the groove in the cam, and independently movableon the dat upper surface of the driver and the coupling connecting thedriver and carriage and located in the recess of the driver.

l2. The combination of the fixed cam-plate, the rota-ry driver having afiat upper surface and a recess in said surface, the knife-carriagehaving rolls entering the groove in the cani, and the couplingconnecting the driver and carriage and located in the recess of thedriver, said coupling being connected with the carriage at a pointcoinciding with one of the cam-engaging rolls on the carriage.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 25th day of July, A. D.1894-.

LEVIS E. ERICSON.

Witnesses:

C. F. BROWN, A. D. HARRISON.

